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Old 05-18-2017, 07:35 PM   #1
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Second A/C location?

KansasFR3 & Harleyreb installed their 2nd A/C in the bedroom and are happy with that.

I just received the gear and ready to install, but now I am doubting the location. Last summer in South Florida it was HOT HOT, and difficult to keep cool inside. Especially the living area. Never really had a problem with the bedroom. In our 28DS the bedroom is basically the whole rear slide. Also, the bedroom vent is in the middle of the coach, but the 'hallway' towards the living area is not, and I am curious if installing the 2nd A/C in there would be the most efficient way (to cool the living area, which seems to heat up the most...) I would hate to cool just my closet and my rear window. The Atwood 15031-15021 is non-ducted and cool airflow is only adjustable in the longitudinal axis, not width...

Perhaps I would be better off putting it in the vent upfront?

Thoughts?
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Old 05-19-2017, 05:41 AM   #2
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My only thought would be how much longer the electrical service line would have to run. Might be a pain to get back to the basement compartment.
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Old 05-19-2017, 06:05 AM   #3
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Originally Posted by yensidcamper View Post
My only thought would be how much longer the electrical service line would have to run. Might be a pain to get back to the basement compartment.
I see what you mean, but I plan to go straight down from the a/c unit and end that line with a ul listed 20amp male inlet to keep this 2nd a/c completely separate from the existing electric system. With its own 20amp breaker right by the outlet.

Using a 20amp+ rated heavy duty cord to the pedestal when at campground.
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Old 05-19-2017, 07:01 AM   #4
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I took a look at your floor plan again and you could install it in that front vent and just close off the ducts in the front area. This way the ducted AC pushes more volume to the rear. Or install it in the rear and close all the ducts in the rear of the coach. If you want to totally seal the duct off from the rear, just use the expandable foam to do that job.

Another thing, make sure if you put it in the front to check the dimensions. We have an Dometic unit up front and its quite a bit smaller footprint that the Atwood units, which are longer. The Atwood unit in our rear installation is only couple inches behind our UFO TV antenna. Just a thought.
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Old 05-19-2017, 07:28 AM   #5
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Originally Posted by KansasFR3 View Post
I took a look at your floor plan again and you could install it in that front vent and just close off the ducts in the front area. This way the ducted AC pushes more volume to the rear. Or install it in the rear and close all the ducts in the rear of the coach. If you want to totally seal the duct off from the rear, just use the expandable foam to do that job.

Another thing, make sure if you put it in the front to check the dimensions. We have an Dometic unit up front and its quite a bit smaller footprint that the Atwood units, which are longer. The Atwood unit in our rear installation is only couple inches behind our UFO TV antenna. Just a thought.
Ill climb on the roof in a little with the shroud and play with it, thanks for the tip!
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Old 05-19-2017, 08:44 AM   #6
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So it will be a tight fit up front on the roof, but it WILL fit. See pics.

Still undecided.

If I put it in the front, it will be easier to cool down the living area, where our 3 large dogs hang out most of the time, which is the reason for installing a second A/C with separate power... Already lost the A/C power once while on a quick kayak trip. Easily gets up to 100'F+ without A/C in Florida summer (this issue was resolved with a separate breaker for the A/C)

If I put it in the bedroom, I would tape off the rear plenum vents, to avoid just cooling the closets above the bed, and to promote cool air to dump towards the living area.
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Old 05-22-2017, 10:26 AM   #7
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Only issue I see is if to remove the cover requires it to come straight up off the unit, it won't come off after you install it unless someone unbolts the unit. Also, since I don't have a KingJack, make sure you rotate that antenna through its range of motion to make sure it interfere. Maybe you can rotate it in a manner to allow you to remove the cover. Idk.
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Old 05-23-2017, 05:54 PM   #8
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done. very happy.

Will post some more details about install later...

Thanks KansasFR3
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Old 05-23-2017, 06:10 PM   #9
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Why so close together?
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Old 05-23-2017, 06:19 PM   #10
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Because it is hot af here in South Florida and the living area is very hard to keep cool, if at all. Never had an issue keeping the bedroom cool, so I opted for the living area...
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